Western Governors University
CCN: NURS 6800
Course Number: D116
Course Title: Advanced Pharmacology for the Advanced Practice
Nurse
Exam: Objective Assessment
Date:2026
An adult patient with treatment-resistant schizophrenia has been stable on Clozapine for two
years. During a follow-up, the patient mentions they have decided to quit smoking "cold
turkey." What is the primary pharmacological concern the PMHNP must address?
A. The patient will experience a sudden decrease in Clozapine serum levels.
B. The absence of nicotine will increase the risk of extrapyramidal symptoms.
C. The cessation of tobacco smoke will inhibit CYP1A2, potentially leading to Clozapine
toxicity.
D. Nicotine withdrawal will directly trigger a relapse of positive symptoms.
Answer: C.
Rationale: Hydrocarbons in tobacco smoke act as potent inducers of the CYP1A2 enzyme.
When a patient stops smoking, the induction stops and the enzyme activity decreases, which
leads to higher serum levels of Clozapine, as it is a 1A2 substrate. This can lead to life-
threatening side effects like seizures or respiratory depression.
A patient with Bipolar I Disorder is stable on Lithium 900 mg daily. They are recently
diagnosed with osteoarthritis and started on Naproxen 500 mg twice daily. Which change in lab
values should the PMHNP anticipate?
A. A significant decrease in serum Lithium levels.
B. An increase in serum Lithium levels.
C. A decrease in serum creatinine.
D. No change, as Naproxen is cleared hepatically.
Answer: B.
Rationale: Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) like Naproxen inhibit renal
prostaglandins. This causes a decrease in renal blood flow and a subsequent reduction in the
renal clearance of Lithium, which can quickly lead to toxic Lithium levels.
True or False: The use of Second-Generation Antipsychotics (SGAs) is associated with a lower
risk of Tardive Dyskinesia primarily because they possess a higher affinity for 5-HT2A
receptors than D2 receptors.
Answer: True.
Rationale: The "serotonin-dopamine antagonism" characteristic of SGAs involves blocking 5-
HT2A receptors. This blockage increases dopamine release in the nigrostriatal pathway, which
,mitigates the potent D2 blockade and lowers the risk of motor side effects like Tardive
Dyskinesia.
Fill in the blank: The life-threatening reaction characterized by "lead-pipe" muscle rigidity,
hyperpyrexia, and autonomic instability in patients taking antipsychotics is known as ________.
Answer: Neuroleptic Malignant Syndrome (NMS).
Rationale: NMS is a rare but fatal idiopathic reaction to antipsychotics. It requires immediate
cessation of the offending agent and aggressive supportive care, often including the use of
Bromocriptine or Dantrolene.
A 24-year-old female patient is being started on Lamotrigine for Bipolar Depression. She also
recently started a combined oral contraceptive pill. What adjustment is necessary for her
Lamotrigine dosing?
A. Decrease the Lamotrigine dose by 50 percent.
B. Increase the titration speed to reach a therapeutic dose faster.
C. Double the maintenance dose of Lamotrigine.
D. Switch to Valproic Acid to avoid the therapeutic interaction.
Answer: C.
Rationale: Ethinyl estradiol found in oral contraceptives induces the glucuronidation of
Lamotrigine. This effectively cuts serum Lamotrigine levels in half. To maintain therapeutic
efficacy, the maintenance dose typically needs to be doubled.
A patient is prescribed Venlafaxine XR 225 mg daily for Major Depressive Disorder. At this
dose, which neurotransmitter systems are significantly impacted?
A. Serotonin only.
B. Serotonin and Norepinephrine.
C. Norepinephrine and Dopamine.
D. Serotonin, Norepinephrine, and Dopamine.
Answer: B.
Rationale: Venlafaxine is an SNRI. At low doses (less than 150 mg), it acts primarily as an
SSRI. Once the dose reaches 150 to 225 mg, the norepinephrine reuptake inhibition becomes
clinically significant, often manifesting as increased blood pressure or heart rate.
True or False: Bupropion is an appropriate first-line treatment for an individual with depression
who has a co-occurring diagnosis of Bulimia Nervosa.
Answer: False.
Rationale: Bupropion is strictly contraindicated in patients with eating disorders. These patients
are prone to electrolyte imbalances which, when combined with Bupropion’s effect on lowering
the seizure threshold, significantly increases the risk of grand mal seizures.
Fill in the blank: In the context of ADHD treatment, Atomoxetine (Strattera) functions primarily
as a selective ________ reuptake inhibitor.
Answer: Norepinephrine.
Rationale: Unlike stimulants that affect dopamine, Atomoxetine is a non-stimulant that
increases norepinephrine levels in the prefrontal cortex. It has a lower abuse potential and is
often used in patients with substance use histories.
A geriatric patient with dementia-related psychosis is prescribed Quetiapine for severe agitation.
According to the FDA "Black Box" warning, what is this patient at an increased risk of?
A. Sudden cardiac death or pneumonia.
,B. Irreversible memory loss.
C. Permanent urinary retention.
D. Chronic liver failure.
Answer: A.
Rationale: The FDA warning for all antipsychotics in elderly patients with dementia-related
psychosis notes a 1.6 to 1.7-fold increase in the risk of death, primarily due to cardiovascular
events or infectious processes like pneumonia.
Which antidepressant is known for having a very long half-life (up to 1 week for its active
metabolite), making it a good choice for patients with poor medication adherence?
A. Sertraline.
B. Paroxetine.
C. Fluoxetine.
D. Fluvoxamine.
Answer: C.
Rationale: Fluoxetine and its active metabolite, norfluoxetine, stay in the system for a long time.
This provides a "built-in" taper and prevents the rapid onset of discontinuation syndrome if a
dose is occasionally swallowed late or missed.
True or False: Mirtazapine is more sedating at lower doses (7.5 mg to 15 mg) than it is at higher
doses (30 mg to 45 mg).
Answer: True.
Rationale: At low doses, Mirtazapine has a high affinity for H1 histamine receptors, causing
sedation. At higher doses, its noradrenergic neurotransmission increases, which counteracts the
antihistamine effects and makes the drug more activating.
Fill in the blank: The constellation of symptoms including myoclonus, hyperreflexia, and
diarrhea resulting from the co-administration of an SSRI and an MAOI is known as ________.
Answer: Serotonin Syndrome.
Rationale: Serotonin Syndrome is caused by excessive synaptic serotonin. The classic triad
includes neuromuscular excitation, autonomic stimulation, and altered mental status. It is a
medical emergency.
An NP is considering starting a patient on Carbamazepine for mood stabilization. To prevent the
risk of a life-threatening rash like Stevens-Johnson Syndrome, which genetic allele must be
screened for in patients of Asian descent?
A. HLA-B1502.
B. CYP2D64.
C. MTHFR.
D. APOE-4.
Answer: A.
Rationale: The HLA-B1502 allele is strongly associated with the development of SJS and Toxic
Epidermal Necrolysis when taking Carbamazepine. Screening is a requirement for this specific
ethnic demographic before prescribing.
A patient on Risperidone 4 mg daily presents with a subjective feeling of inner restlessness and
the inability to sit still. Which medication is the gold-standard treatment for this condition?
A. Benztropine.
, B. Diphenhydramine.
C. Propranolol.
D. Lorazepam.
Answer: C.
Rationale: This patient is experiencing akathisia, a common EPS. While anticholinergics work
for dystonia and parkinsonism, beta-blockers like Propranolol (20 to 60 mg/day) are the most
effective treatment for the restlessness associated with akathisia.
True or False: Valproic Acid is a potent enzyme inducer, which leads to decreased levels of
other drugs like Lamotrigine when used in combination.
Answer: False.
Rationale: Valproic Acid is actually a potent enzyme inhibitor. When added to Lamotrigine, it
inhibits glucuronidation, leading to a doubling of Lamotrigine levels. This significantly
increases the risk of life-threatening rashes.
Fill in the blank: The specific cytochrome P450 enzyme responsible for metabolizing
approximately 25 percent of all psychotropic medications, including many SSRIs and
antipsychotics, is ________.
Answer: CYP2D6.
Rationale: 2D6 is highly polymorphic. Patients can be poor, intermediate, extensive, or ultra-
rapid metabolizers, which explains why different patients require significantly different doses of
the same medication.
A patient with Alcohol Use Disorder is being treated with Naltrexone. What is the mechanism
of action by which this medication reduces drinking behavior?
A. It induces severe nausea and vomiting if alcohol is consumed.
B. It blocks mu-opioid receptors, reducing the "reward" or euphoria of alcohol consumption.
C. It acts as a glutamate antagonist to prevent withdrawal seizures.
D. It increases the liver's ability to metabolize ethanol.
Answer: B.
Rationale: Naltrexone is an opioid antagonist. Since endogenous opioids are released when one
drinks alcohol, blocking these receptors takes away the pleasurable reinforcement, leading to
reduced cravings and lower rates of heavy drinking.
A nursing student asks why Methylphenidate is preferred over Amphetamine in certain patients.
The NP explains that Methylphenidate primarily works by:
A. Stimulating the massive release of stored dopamine into the synapse.
B. Blocking the reuptake of dopamine and norepinephrine into the presynaptic neuron.
C. Acting as a direct agonist at D2 receptors.
D. Inhibiting the enzyme Monoamine Oxidase B.
Answer: B.
Rationale: Methylphenidate is a reuptake inhibitor. Amphetamines are more complex because
they both block reuptake and cause the active release of dopamine. This difference often
informs side effect profiles and clinical response.
True or False: To initiate Clozapine therapy, the patient's baseline Absolute Neutrophil Count
(ANC) must be at least 1500/uL for the general population.
Answer: True.
CCN: NURS 6800
Course Number: D116
Course Title: Advanced Pharmacology for the Advanced Practice
Nurse
Exam: Objective Assessment
Date:2026
An adult patient with treatment-resistant schizophrenia has been stable on Clozapine for two
years. During a follow-up, the patient mentions they have decided to quit smoking "cold
turkey." What is the primary pharmacological concern the PMHNP must address?
A. The patient will experience a sudden decrease in Clozapine serum levels.
B. The absence of nicotine will increase the risk of extrapyramidal symptoms.
C. The cessation of tobacco smoke will inhibit CYP1A2, potentially leading to Clozapine
toxicity.
D. Nicotine withdrawal will directly trigger a relapse of positive symptoms.
Answer: C.
Rationale: Hydrocarbons in tobacco smoke act as potent inducers of the CYP1A2 enzyme.
When a patient stops smoking, the induction stops and the enzyme activity decreases, which
leads to higher serum levels of Clozapine, as it is a 1A2 substrate. This can lead to life-
threatening side effects like seizures or respiratory depression.
A patient with Bipolar I Disorder is stable on Lithium 900 mg daily. They are recently
diagnosed with osteoarthritis and started on Naproxen 500 mg twice daily. Which change in lab
values should the PMHNP anticipate?
A. A significant decrease in serum Lithium levels.
B. An increase in serum Lithium levels.
C. A decrease in serum creatinine.
D. No change, as Naproxen is cleared hepatically.
Answer: B.
Rationale: Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) like Naproxen inhibit renal
prostaglandins. This causes a decrease in renal blood flow and a subsequent reduction in the
renal clearance of Lithium, which can quickly lead to toxic Lithium levels.
True or False: The use of Second-Generation Antipsychotics (SGAs) is associated with a lower
risk of Tardive Dyskinesia primarily because they possess a higher affinity for 5-HT2A
receptors than D2 receptors.
Answer: True.
Rationale: The "serotonin-dopamine antagonism" characteristic of SGAs involves blocking 5-
HT2A receptors. This blockage increases dopamine release in the nigrostriatal pathway, which
,mitigates the potent D2 blockade and lowers the risk of motor side effects like Tardive
Dyskinesia.
Fill in the blank: The life-threatening reaction characterized by "lead-pipe" muscle rigidity,
hyperpyrexia, and autonomic instability in patients taking antipsychotics is known as ________.
Answer: Neuroleptic Malignant Syndrome (NMS).
Rationale: NMS is a rare but fatal idiopathic reaction to antipsychotics. It requires immediate
cessation of the offending agent and aggressive supportive care, often including the use of
Bromocriptine or Dantrolene.
A 24-year-old female patient is being started on Lamotrigine for Bipolar Depression. She also
recently started a combined oral contraceptive pill. What adjustment is necessary for her
Lamotrigine dosing?
A. Decrease the Lamotrigine dose by 50 percent.
B. Increase the titration speed to reach a therapeutic dose faster.
C. Double the maintenance dose of Lamotrigine.
D. Switch to Valproic Acid to avoid the therapeutic interaction.
Answer: C.
Rationale: Ethinyl estradiol found in oral contraceptives induces the glucuronidation of
Lamotrigine. This effectively cuts serum Lamotrigine levels in half. To maintain therapeutic
efficacy, the maintenance dose typically needs to be doubled.
A patient is prescribed Venlafaxine XR 225 mg daily for Major Depressive Disorder. At this
dose, which neurotransmitter systems are significantly impacted?
A. Serotonin only.
B. Serotonin and Norepinephrine.
C. Norepinephrine and Dopamine.
D. Serotonin, Norepinephrine, and Dopamine.
Answer: B.
Rationale: Venlafaxine is an SNRI. At low doses (less than 150 mg), it acts primarily as an
SSRI. Once the dose reaches 150 to 225 mg, the norepinephrine reuptake inhibition becomes
clinically significant, often manifesting as increased blood pressure or heart rate.
True or False: Bupropion is an appropriate first-line treatment for an individual with depression
who has a co-occurring diagnosis of Bulimia Nervosa.
Answer: False.
Rationale: Bupropion is strictly contraindicated in patients with eating disorders. These patients
are prone to electrolyte imbalances which, when combined with Bupropion’s effect on lowering
the seizure threshold, significantly increases the risk of grand mal seizures.
Fill in the blank: In the context of ADHD treatment, Atomoxetine (Strattera) functions primarily
as a selective ________ reuptake inhibitor.
Answer: Norepinephrine.
Rationale: Unlike stimulants that affect dopamine, Atomoxetine is a non-stimulant that
increases norepinephrine levels in the prefrontal cortex. It has a lower abuse potential and is
often used in patients with substance use histories.
A geriatric patient with dementia-related psychosis is prescribed Quetiapine for severe agitation.
According to the FDA "Black Box" warning, what is this patient at an increased risk of?
A. Sudden cardiac death or pneumonia.
,B. Irreversible memory loss.
C. Permanent urinary retention.
D. Chronic liver failure.
Answer: A.
Rationale: The FDA warning for all antipsychotics in elderly patients with dementia-related
psychosis notes a 1.6 to 1.7-fold increase in the risk of death, primarily due to cardiovascular
events or infectious processes like pneumonia.
Which antidepressant is known for having a very long half-life (up to 1 week for its active
metabolite), making it a good choice for patients with poor medication adherence?
A. Sertraline.
B. Paroxetine.
C. Fluoxetine.
D. Fluvoxamine.
Answer: C.
Rationale: Fluoxetine and its active metabolite, norfluoxetine, stay in the system for a long time.
This provides a "built-in" taper and prevents the rapid onset of discontinuation syndrome if a
dose is occasionally swallowed late or missed.
True or False: Mirtazapine is more sedating at lower doses (7.5 mg to 15 mg) than it is at higher
doses (30 mg to 45 mg).
Answer: True.
Rationale: At low doses, Mirtazapine has a high affinity for H1 histamine receptors, causing
sedation. At higher doses, its noradrenergic neurotransmission increases, which counteracts the
antihistamine effects and makes the drug more activating.
Fill in the blank: The constellation of symptoms including myoclonus, hyperreflexia, and
diarrhea resulting from the co-administration of an SSRI and an MAOI is known as ________.
Answer: Serotonin Syndrome.
Rationale: Serotonin Syndrome is caused by excessive synaptic serotonin. The classic triad
includes neuromuscular excitation, autonomic stimulation, and altered mental status. It is a
medical emergency.
An NP is considering starting a patient on Carbamazepine for mood stabilization. To prevent the
risk of a life-threatening rash like Stevens-Johnson Syndrome, which genetic allele must be
screened for in patients of Asian descent?
A. HLA-B1502.
B. CYP2D64.
C. MTHFR.
D. APOE-4.
Answer: A.
Rationale: The HLA-B1502 allele is strongly associated with the development of SJS and Toxic
Epidermal Necrolysis when taking Carbamazepine. Screening is a requirement for this specific
ethnic demographic before prescribing.
A patient on Risperidone 4 mg daily presents with a subjective feeling of inner restlessness and
the inability to sit still. Which medication is the gold-standard treatment for this condition?
A. Benztropine.
, B. Diphenhydramine.
C. Propranolol.
D. Lorazepam.
Answer: C.
Rationale: This patient is experiencing akathisia, a common EPS. While anticholinergics work
for dystonia and parkinsonism, beta-blockers like Propranolol (20 to 60 mg/day) are the most
effective treatment for the restlessness associated with akathisia.
True or False: Valproic Acid is a potent enzyme inducer, which leads to decreased levels of
other drugs like Lamotrigine when used in combination.
Answer: False.
Rationale: Valproic Acid is actually a potent enzyme inhibitor. When added to Lamotrigine, it
inhibits glucuronidation, leading to a doubling of Lamotrigine levels. This significantly
increases the risk of life-threatening rashes.
Fill in the blank: The specific cytochrome P450 enzyme responsible for metabolizing
approximately 25 percent of all psychotropic medications, including many SSRIs and
antipsychotics, is ________.
Answer: CYP2D6.
Rationale: 2D6 is highly polymorphic. Patients can be poor, intermediate, extensive, or ultra-
rapid metabolizers, which explains why different patients require significantly different doses of
the same medication.
A patient with Alcohol Use Disorder is being treated with Naltrexone. What is the mechanism
of action by which this medication reduces drinking behavior?
A. It induces severe nausea and vomiting if alcohol is consumed.
B. It blocks mu-opioid receptors, reducing the "reward" or euphoria of alcohol consumption.
C. It acts as a glutamate antagonist to prevent withdrawal seizures.
D. It increases the liver's ability to metabolize ethanol.
Answer: B.
Rationale: Naltrexone is an opioid antagonist. Since endogenous opioids are released when one
drinks alcohol, blocking these receptors takes away the pleasurable reinforcement, leading to
reduced cravings and lower rates of heavy drinking.
A nursing student asks why Methylphenidate is preferred over Amphetamine in certain patients.
The NP explains that Methylphenidate primarily works by:
A. Stimulating the massive release of stored dopamine into the synapse.
B. Blocking the reuptake of dopamine and norepinephrine into the presynaptic neuron.
C. Acting as a direct agonist at D2 receptors.
D. Inhibiting the enzyme Monoamine Oxidase B.
Answer: B.
Rationale: Methylphenidate is a reuptake inhibitor. Amphetamines are more complex because
they both block reuptake and cause the active release of dopamine. This difference often
informs side effect profiles and clinical response.
True or False: To initiate Clozapine therapy, the patient's baseline Absolute Neutrophil Count
(ANC) must be at least 1500/uL for the general population.
Answer: True.
